5. Mario Mazzola
Co-Founder, Insieme Networks
Cisco has poured $100 million into Insieme Networks, a software-defined networking "spin-in" that could prove critical to Cisco's SDN efforts. Mazzola, once Cisco's chief development officer, along with former Cisco engineers Prem Jain and Luca Cafiero, are working on the Insieme project, which Cisco has only described as an "application-centric infrastructure" for data center networks.